It started off typically enough. A year ago, as the merger between David Zaslav’s Discovery Communications and AT&T’s WarnerMedia was about to give birth to the corporate entity known as Warner Bros. Discovery, some Delaware lawyers began recruiting clients and making “Section 220 demands”—firm but polite requests under Delaware corporate law to inspect the books of the merging entities. Depositions were taken, and in December, class action complaints were filed, initially under seal, that alleged the media behemoth’s formation gave investors short shrift. A legal challenge will now proceed just as the company begins to make good on Zaz’s promises to Wall Street analysts.